I think it is pretty grandma-proof; less is more. Windows xp-like start menu with no web results or other nonsense there, just internet button, picture viewer, and solitaire. Updates can be automated and there's no easy way to break the ui, like accidentally removing the task bar.
I know that problem too well, but working with old hardware or software is a very different thing to replicating the retro look.
What I might do to open it up, is to replace the mentioned console generations with a more generic "old". I remember someone did real-time raytracing on the PS3 CPU, which was pretty cool.
I just started thinking about demakes and other such things while going over my YT subscriptions for content.
But while this is not strictly limited to consoles and that era, I'm gonna say no; this is mostly about systems, and not the style.
I almost created the community at !cool3dtechnology@suppo.fi, but didn't like the name for this purpose. I decided to maybe open it for shaders and graphics, from a gamedev-ish perspective. I think retro-lowpoly-graphics are cool and it would have a bunch of that.
m8